i am moving a large store from 1.5 to 3.
everything was working fine but since moving the data across and uploading all the images to the server the image manager popup has stopped working.
I saw in the search that images over 3mb break the manager so i removed them but the popup still doesn't work.
Is there a way to increase the image limit? or is there another fix?

The codes I provided on that topic is NOT a bug-fix. It is a simple solution to provide an output whenever the maximum server tolerance limit size has been reached when using the uploads. With this addition, you are being notified whenever an error is returned on screen. Yes, you should apply it in order to extend this troubleshooting especially if you are not sure on why this issue is occurring since the upgrade.

As for the latest bug-fixes on Github Opencart, that would be the best option to use the master files whether it's a new installation or an upgrade process for Opencart.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

Yes, you should apply it in order to extend this troubleshooting especially if you are not sure on why this issue is occurring since the upgrade.

The first solution for troubleshooting this issue is posted ... right here ...

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

Clear all caches after implementing this page, use the developers kit by hitting F12, go to the console tab and re-click on the image manager. Also provide the latest events of your error logs based on this action.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

If you haven't downloaded Opencart from Github Opencart master files, I would suggest to download the ZIP file from that location and install a fresh copy of Opencart on a separated folder with a new database on your server noticing if this issue will persist.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

thats how i started along this road.
i had this cart installed with a few mods which caused problems so i installed a new database and followed the various bug fixes that still needed to be done.
then installed journal theme and it ran fine, installed nitro but kept switched off and runs fine.
only thing I've now done is install import export which worked ok until i copied the image folder over from the old store to this new store...
figured it was a file size issue so I've deleted the images from the data folder but issue now persists.

Try with a fresh install without installing any extensions with the master files and keep monitoring the logs and the image manager button until identifying the source of the issue when transferring your images from v1.5 to v3.x .

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

Ensure your database credentials are correctly entered from your config.php and admin/config.php files. Although, if you are able to login into the admin and seeing these logs as new entries when hitting a page or a feature, including the image manager:

As per this page describes: https://stackoverflow.com/questions/286 ... now-and-th . Your host is not using an FQDN name for your database IP address. Contact your host to gather the right host name configuration for your database and make those changes accordingly in your config.php and admin/config.php files. This issue should be rectified afterwards.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

Simply compare both config files from your old installation to your new install's configuration files ... if you do not remember your credentials, contact your host.

The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.

the error is on both installs but i will contact the host thank you.
out of interest do you know where product images get saved to?
the folder structure seems to be different to 1.5
1.5 has all product images saved in image/data however oc3 doesn't have this folder from the standard install...